Machine for sawing quartered oak or mahogany veneering.



No. 787,493. PATENTED APR. 18,1905 A. BROSIUS.

MAGHINE FOR SAWING QUARTERED OAK OR. MAHOGANY VENEERING. APPLIQATIONFILED JAN.14, 1905.

3 SHEETS-SHEET 1.

V '-i v a 5 Inventor attorney PATENTED APR. 18, 1905.

A. BROSIUS.

MACHINE FOR SAWING QUARTERED OAK OR MAHOGANY VENEBRING.

APPLICATION FILED JAN. 14, 1905.

3 SHEETS-SHEET 2.

31 man tea PATENTED APR. 18, 1905.

- A. BROSIUS. MACHINE FOR SAWING QUARTERED OAK OR MAHOGANY VENBBRING.

APPLICATION FILED JAN. 14, 1905.

3 SHEETB--SHEET 3.

Wanna UNITED STATES Tatented April 18, 1905.

PATENT OFFICE.

AARON BROSIUS, OF EVANSVILLE, INDIANA, ASSIGNOR TO Z. T. ROBINSON, OFOWVENSBORO, KENTUCKY.

MACHINE FOR SAWING QUARTERED OAK OR MAHOGANY VENEERING.

SPECIFICATION forming part of Letters Patent No. 787,493, dated April18, 1905.

Application filed January 14:, 1905. Serial No. 241,059.

ments in Machines for Sawing Quartered Oak' or Mahogany veneering, ofwhich the following is a specification.

This invention relates to machines for sawing quartered oak or mahoganyveneering.

In quarter-sawing logs the principal object is to obtain the beautifulfigured efi ect, and the ordinary methods now in use only produce aboutone-sixth of the log in good-ligu red material. The balance of the logis of inferior figuring,and this enhances the price of veneering takenfrom the best part of the wood. The usual method after quartering thelog is to saw a flitch out of a quarter as near coincident with thegrain as possible, and four of such flitches are obtained from the fourquarters of the log. This permits cutting only four times with the grainand will not produce more than about one-tenth of the log infull-figured stock. The flitch is secured to the sawmill stay-log, andsuccessive strips of veneering are sawed from this flitch; but as thefull-figured material can only be obtained for a small distance in thecenter of the flitch the balance of the flitch produces second-ratestock.

The object of the present invention is to provide an improved machinewhich will saw practically the entire log into figured stock, therebyobviating the immense loss heretofore incident to sawing veneering.

The improved machine 1 have devised saws the quartered log practicallyalong the lines of the grain, which radiate from the center to thecircumference or outer portion of the log, as contradistinguished fromthe ordinary method, by which the strips are sawed off in such way thatsuccessive strips intersect succeeding radiating grains of the log, onlya small portion of the strips being with the grain in the ordinarymethod of sawing.

The present invention contemplates the provision of a tilting stay-log,improved means for tilting the stay-log and the quartered log heldthereby successively to different angles of inclination, and novel meansfor locking the stay-log and adjusting mechanism where positioned, thepreferred embodiment of the invention being set forth in theaccompanying drawings and following specification and the novel featuresrecited in the appended claims. 7 In the accompanying drawings, Figure 1is a plan view'of the machine; Fig. 2-, an end elevation; Fig. 3, a rearelevation; Fig. 4, a detail perspective view of the locking-shaft andlocking devices carried thereby for engaging the sectoral heads andsegmental racks; Fig. 5, a detail of one of the friction clamping blocksor shoes; Fig. 6, a diagram illustrating how the flitch is sawed fromthe quarter-log according to the ordinary method of sawing; Fig. 7, aView showing how the flitch is held by the stay-log and successiveveneers are sawed therefrom, only a few of which coincide' with thegrain; Fig. 8, a view illustrating how the veneering is sawed with thepresent invention; and Fig. 9, a View showing by dotted lines the mannerin which the quartered log is tilted after the first flitch of veneershave been sawed as shown in Fig. 8, full lines representing how thestay-log is receded back from the sawing-line to begin the cutting ofthe succeeding flitch of veneers.

The sawn1ill-carriage 1 is adapted to reciprocate on its ways 2 inrelation to the veneersaw 3 to cause the cut to be made from one end ofthe log to the other, any suitable means commonly employed for travelingthe carriage being used. The carriage has transverse ways or tracks 4,on'which slide the heads 5, adjustable on the tracks or ways 4 by theset-works 6 of well-known construction. The heads 5 are preferably inthe form of sectors and have curved beveled faces? and segmental racks 8located at the sides thereof. Located between the heads 5 is thestay-log 9, which has trundles 10 mounted in the heads 5, whereby thestay-log is pivoted at the center of the circles in which the curvedbeveled surfaces 7 and racks 8 are located.

J ournaled in suitable bearings 11 on the staylog 9 is anoperating-shaft 12, carrying pinions 13, meshing with the segmentalracks 8, and on this shaft is secured a wheel 14, havinga plul thestay-log in its adjusted position constirality of radially-disposedsockets 15 at different points of the periphery thereof for thereception of a movable lever 16, by which the shaft 12 is turned torevolve the pinions 13 and raise or lower the stay-log 9 and bring the quartered log 17, secured thereon by the usual clamps or dogs 18, to thedesired angle for cutting the veneers therefrom, as will appear morefully hereinafter.

Journaled in bearings 19 on the stay-log 9 is a shaft 20, having a wheel21 similar in all respects to the wheel 14 and operable by a re; movablelever 22. The shaft-2O is provided with locking abutment collars 23,which are shrunk on said shaft or otherwise permanently attached theretoor which could be formed as integral enlargements of said shaft, saidcollars lying just inside the segmental racks 8 to barely graze thesame. The extremities of shaft 20 are screw-threaded,one end, 20, beingprovided with right-hand screw-threads and the other end, 20", beingprovided with lefthand screw-threads. The screw-threaded portions 20 and20" are engaged with similar screw-threads made interiorly in thefriction clamping blocks or shoes 24, which have curved beveled faces24. to conform to the peripheral beveled faces 7'of the sectoral heads5. It will be understood that by operating lever 22 the rotation ofshaft 20 in one direction will cause the clamping blocks or shoes 24 tomove away from the sectoral heads 5, and the rotation of said shaft 20in the opposite direction will cause the clamping-blocks to be drawntoward each other into firm frictional engagement with the beveledportions 7 of the sectoral heads to thereby securely lock the staylog inits adjusted position. In the foregoing operation the abutment-collars23 are drawn firmly against the segmental racks 8, so that a clampingaction is had on one side of both racks and the opposite side of eachsectoral head. The curvature of the beveled faces 24 prevents idleturning of the clamping-blocks 24 when the shaft 20 is rotated. It willbe understood that the trundles 10 and their bearings soon become wornfrom the great strains in a machine of this kind, and consequently thepivoting or centering of the stay-log is more or less loose. Inasmuch asthe slightest wabble of the log will cause a very great variation atdifferent points in the thickness of the veneer being cut and even causecutting off of the veneer short of its desired length, it can be seenthat absolute rigidity of the stay-log when adjusted is necessary. Bythe employment of the beveled surfaces 7 and 24 a second clamping actionis obtained. 0., a pulling clamping actionwhich is resisted at thetrundles 10, which are thereby drawn tight in their bearings, and nomatter how loose the hearings or trundles may have worn absoluterigidity is obtained when clamping the staylog. The clamping mechanismfor securing tutes the novelty of this invention over the disclosures ofmy copcnding application, filed June 29, 1904, Serial No. 214,669, andin the present application I lay no claim to other features of thepresent invention. The pinions 13, shaft 12, wheel 14, and lever 16afford a simple, strong, and rapidly-operable mechanism for adjustingthe stay-log to its different inclinations with the greatest case, itbeing understood that the lever is placed in the sockets 15 successivelyto accomplish the successive adjustments of the stay-log. The lockingmechanism, comprising the shaft 20, clamping-blocks 24, andabutment-collars 23, constitutes the means for rapidly and easilylocking the stay-log at any point without danger of loosening during thesawing operation or from the weight of the parts, and the desirabilityof provision of such a mechanism will be clear when it is understoodthat during the course of a days Work several hundred adjustments andlockings of the staylog become necessary, which precludes the use of anybut a fast operating locking mechanism.

Referring first to Fig. 6, there is shown at A a quarter-log, the linesa, of which indicate the flitch, which according to the ordinary methodsof sawing veneers is the only part of thequarter available if goodfigured effects in the veneering are desired, the balance I) Z) of thequarter being second-rate stock on account of the manner in which thegrain-lines c radiate from the center (Z of the log.

In Fig. 7 the fiitch a is shown secured to the stay-log 9, from whichthe veneers are cut successively, as shown, by successive transversefeedings of the stay-log in the ordinary method of sawing. It will beobvious that owing to the radiation of the grain-lines only certainveneers at the center of the flitch have the beautiful full-figuredeffect, the balance of the veneers being of inferior appearance.

Referring to Figs-8 and 9 in connection with the following descriptionof the opera tion of the machine will give a clear understanding of themanner in which veneers are sawed by my invention and how practicallythe entire log is used and agood figured effect obtained.

The quartered log A is secured to the staylog 9 by ordinary clamps 18.The stay-log being in a substantially horizontal position, the carriageis traveled back and forth on its IIO ways, and a number of veneers fare sawed ter'ed' log to the position shown in dotted lines in Fig. 9,from which it will be seen-that a portion "2; of the log projects beyondthe sawing-line the width of the new flitch of veneers to be sawed.After looking the stay-log the heads 5 and stay-log are receded, asindicated by the arrow, by operation of the set-works to bring thestay-log to the position shown in full lines in Fig. 9. After cuttingoff the small triangular strip g, which necessarily goes to waste,another flitchh of veneers is sawed until the figuring becomes pooragain, when the foregoing operations are repeated. It will be understoodthat the distance the stay-log is receded will be equal to the width ofthe flitch of veneers it is desired to saw. Successive operationscarried on as before described eventually saw up the entire quarter,except a thin strip of usually less than one inch, which remains andwhich is the part engaged by the clamps 18. It will be understood thatin each sawing of a veneer by my machine a cut is made either along thegrainline or approximating itthat is, in approximately a radialdirection of the quarter.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

1. In a veneer-sawing machine, the combination with a carriage, of atilting stay-log for holding the quarter-log, means for adjusting thetilting stay-log to different angles of inclination, and lockingmechanism for securing the stay-log where adjusted comprising a rotarylocking-shaft, clamping shoes or blocks movable longitudinally of thelocking-shaft, means for operating said clamping shoes or blockslongitudinally of the locking-shaft, and means against which the saidshoes can clamp.

2. In a veneer-sawing machine, the combination with a carriage, of atilting stay-log for holding the quarter-log, means for adjusting thetilting stay-log to different angles of inclination, and lockingmechanism for securing the stay-log where adjusted comprising a rotarylocking-shaft, clamping shoes or blocks having a screw-threadedengagement with the locking-shaft by which they are advanced orretreated on turning said locking-shaft, and means against which thesaid shoes can clamp.

3. In a veneer-sawing machine, the combination with a carriage, of atilting stay-log for holding the quarter-log, means for adjusting thetilting stay-log to different angles of inclination, and lockingmechanism for securing the stay-log where adjusted comprising a rotarylocking-shaft having right and left hand screw-threads, clamping shoesor blocks engaged with the respective screw-threaded portions of thelocking shaft, and means against which the said shoes can clamp.

4. In a veneer-sawing machine, the combination witha carriage, of apivoted tilting stay-log for holding the quarter-log, means foradjusting the tilting stay-log to different angles of inclination, andlocking mechanism for securing the stay-log where adjusted comprising arotary locking-shaft having screwthreaded portions, beveled clampingshoes or blocks engaged with the respective screwthreaded'portionsaforesaid, and beveled members against which the beveled portions of theshoes are adapted to clamp, to draw the staylog snug at its pivots.

5. In a veneer-sawing machine, the combination with a carriage, of atilting stay-log for holding the quarter-log, means for adjusting thetilting stay-log to different angles of inclination, and lockingmechanism for securing the stay-log where adjusted comprising a rotarylockingshaft, separated clamping members operated toward and away fromeach other by said shaft, and means adapted to be clamped between theshoes.

6. In a veneer-sawing machine, the combination with a carriage, of atilting stay-log for holding the quarter-log, means for adjusting thetilting stay-log to different angles of inclination, and lockingmechanism forsecuring the stay-log where adjusted comprising a rotarylocking-shaft having screw-threaded portions, clamping blocks or shoesoperated by said screw-threaded portions, abutment members carried bysaid shaft, and means adapted to be clamped between the shoes andabutment members.

7. In a veneer-sawing machine, the combination with a carriage, of atilting stay-log for holding the quarter-log, means for adjusting thetilting stay-log to different angles of inclination, and lockingmechanism for securing the stay-log where adjusted comprising a rotarylocking-shaft having-right and left hand screw threaded portions,clamping blocks or shoes engaged by the respective screw-threadedportions aforesaid, abutment members rigid with the shaft, and meansadapted to be clamped between the shoes and abutment members.

8. In a veneer-sawing machine, the combination with a carriage, of atilting stay-log for holding the quarter-log, means for adjusting thetilting stay-log to different angles of inclination, and lockingmechanism for securing the stay-log where adjusted comprising clampingshoes or blocks adjustable toward or away from each other, means foradjusting said shoes or blocks toward or away from each other, and meansadapted to be clamped between said shoes or blocks.

9. In a Veneer-sawing machine, the combination with a carriage, of apivoted tilting stay-log for holding the quarter-log, means foradjusting the tilting stay-log to different angles of inclination, andlocking mechanism for securing the stay-log where adjusted comprisingclamping shoes or blocks adjustable toward or away from each other, oneof which has a beveled portion, means for adjusting said shoes or blockstoward or away from each other, and a beveled member against which thebeveled portion of said shoe is adapted to clamp and against which theother shoe is also adapted to clamp, whereby the stay-log is bothclamped to the member aforesaid and also drawn snug at its pivots.

10. In a veneer-sawing machine, the combination with a carriage, of apivoted tilting stay-log for holding the quarter-log, means foradjusting the tilting stay-log to different angles of inclination, andlocking mechanism for securing the stay-log where adjusted embracingmeans for exerting a drawing action on the stay-log outwardly inrelation to the pivots thereof to draw the stay-log snug at its pivots.

11. In a veneer-sawing machine, the combination with a carriage, of apivoted tilting stay-log for holding the quarter-log, means foradjusting the tilting stay-log to different angles of inclination, andlocking mechanism for securing the stay-log where adjusted embracing arelatively stationary beveled memher, a movable beveled clamping orlooking member carried by the stay-log, and adapted to bear against thestationary beveled member, and means for clamping and releasing themovable locking member.

In testimony whereof I hereunto aflix my signature in presence of twowitnesses.

AARON BROSIUS. Witnesses:

JON. L. LARKIN, FRANK (J. GORE.

